hydrogen; palladium on activated charcoal in N,N-dimethyl-formamide P=2585.7 Torr; 3 h;

1: 63 percent / triphenylphosphine, hydrazoic acid, diethyl azodicarboxylate / benzene / 3 h / Ambient temperature 2: 93 percent / H2 / 10 percent Pd/C / dimethylformamide / 3 h / 2585.7 Torr View Scheme

lithium hydroxide in methanol; water T=0°C; 17 h;